Noun crayfish has 4 senses
  1. spiny lobster, langouste, rock lobster, crayfish - warm-water lobsters without claws; those from Australia and South Africa usually marketed as frozen tails; caught also in Florida and California
    --1 is a kind of shellfish
    --1 is a part of
     spiny lobster, langouste, rock lobster, crawfish, crayfish, sea crawfish
  2. crayfish, crawfish, crawdad, ecrevisse - tiny lobster-like crustaceans usually boiled briefly
    --2 is a kind of shellfish
    --2 is a part of American crayfish; Old World crayfish, ecrevisse
  3. crayfish, crawfish, crawdad, crawdaddy - small freshwater decapod crustacean that resembles a lobster
    --3 is a kind of decapod crustacean, decapod
    --3 is a member of Astacidae, family Astacidae, Astacura
    --3 has particulars: Old World crayfish, ecrevisse; American crayfish
  4. spiny lobster, langouste, rock lobster, crawfish, crayfish, sea crawfish - large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
    --4 is a kind of lobster
    --4 is a member of Palinurus, genus Palinurus
    --4 has parts: spiny lobster, langouste, rock lobster, crayfish
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